Two new frameworks of potassium saccharate obtained from acidic and alkaline solution

Two chiral K(I) complexes based on d-saccharic acid (H2sac), [K(Hsac)]n (1) and [K2(sac)]n (2) were obtained from acidic and alkaline solution. The 3D framework of 1 includes K(I) polyhedral rods and typical pairwise coaxial right- and left-handed helical chains, and displays binodal 6-connected pcu topology. 2 contains 2D polyhedral sheets consisting of left-handed helical chains, and generates 3D network with an unprecedented (7,11)-connected net. Cyclic voltammetry tests and charge–discharge tests indicate that the addition of complex 2 to the electrolyte could improve the electrochemical properties of the nickel hydroxide electrode.

Two K(I) complexes based on d-saccharic acid (H2sac), [K(Hsac)]n (1) and [K2(sac)]n (2) were obtained and characterized. Electrochemical studies indicate the potential use of 2 in Ni–MH battery.Figure optionsDownload as PowerPoint slideHighlights
► Two novel chiral K(I) frameworks based on d-saccharic acid were obtained.
► The structure of 1 includes K(I) polyhedral rods and typical helical chains.
► 2 contains 2D polyhedral sheets and generates an unprecedented (7,11)-connected net.
► Addition of 2 to electrolyte could improve the nickel hydroxide electrode's property.